According to some of WSJ's sources, Android boss Andy Rubin said at an executive event last fall that Samsung's dominance could eventually become a threat to Google.

Luckily, Google now owns Motorola, which it can use as leverage against Samsung.

This isn't a new theme.

Publicly, Google has said it plans to treat all Android partners equally and will continue giving the operating system away for free. But if consumers start buying Samsung devices instead of those made by Google and its other Android partners, Google could start closing off Android and give Motorola all the latest and greatest features.

The best example of this is the so-called X Phone, which is reportedly being developed by both Google and Motorola for launch later this year. We've also heard from sources that Google plans to use Motorola to make its own hardware instead of relying only on third parties.